Crosswordese.Com



Word of the Day – Thursday, January 26th

 


Home

Word of the Day

Archives

Clever Clue of the Month

The Cruciverbalist

Links

Daily Email







EGEST (ee-JEST)

To discharge or eliminate from the body
Common clues:
Discharge; Excrete; Spew out; Cast out; Throw out; Void; Perspire
Crossword puzzle frequency: once a year
Video:
Hawaiian Volcano Still Spews Hot Lava


The most common perception of a volcano is of a conical mountain, spewing lava and poisonous gases from a crater at its summit. This describes just one of many types of volcano, and the features of volcanoes are much more complicated. The structure and behavior of volcanoes depends on a number of factors. Some volcanoes have rugged peaks formed by lava domes rather than a summit crater, whereas others present landscape features such as massive plateaus. Vents that issue volcanic material (lava, which is what magma is called once it has escaped to the surface, and ash) and gases (mainly steam and magmatic gases) can be located anywhere on the landform. Many of these vents give rise to smaller cones such as Puʻu ʻŌʻō on a flank of Hawaii's Kīlauea.


A view taken from the International Space Station of the Sarychev Volcano on the Kuril Islands in an early stage of eruption on June 12, 2009.


Other types of volcano include cryovolcanoes (or ice volcanoes), particularly on some moons of Jupiter, Saturn and Neptune; and mud volcanoes, which are formations often not associated with known magmatic activity. Active mud volcanoes tend to involve temperatures much lower than those of igneous volcanoes, except when a mud volcano is actually a vent of an igneous volcano.




This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Volcano".